OSX/sec/Security/SecImportExport.c

   1 /*
   2  * Copyright (c) 2007-2008,2012-2013 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #include <Security/SecBase.h>
  25 #include <Security/SecBasePriv.h>
  26 #include <Security/SecItem.h>
  27 #include <Security/SecRSAKey.h>
  28 #include <Security/SecECKey.h>
  29 #include <Security/SecCertificate.h>
  30 #include <Security/SecIdentityPriv.h>
  31 #include <Security/SecPolicy.h>
  32 #include <Security/SecTrust.h>
  33 #include <Security/SecInternal.h>
  34 #include <libDER/oids.h>
  35
  36 #include <AssertMacros.h>
  37
  38 #include "p12import.h"
  39 #include "SecImportExport.h"
  40
  41 const CFStringRef kSecImportExportPassphrase = CFSTR("passphrase");
  42 const CFStringRef kSecImportItemLabel = CFSTR("label");
  43 const CFStringRef kSecImportItemKeyID = CFSTR("keyid");
  44 const CFStringRef kSecImportItemTrust = CFSTR("trust");
  45 const CFStringRef kSecImportItemCertChain = CFSTR("chain");
  46 const CFStringRef kSecImportItemIdentity = CFSTR("identity");
  47
  48 typedef struct {
  49     CFMutableArrayRef certs;
  50     p12_error *status;
  51 } collect_certs_context;
  52
  53
  54 static void collect_certs(const void *key, const void *value, void *context)
  55 {
  56     if (!CFDictionaryContainsKey(value, CFSTR("key"))) {
  57         CFDataRef cert_bytes = CFDictionaryGetValue(value, CFSTR("cert"));
  58         if (!cert_bytes)
  59             return;
  60         collect_certs_context *a_collect_certs_context = (collect_certs_context *)context;
  61         SecCertificateRef cert =
  62             SecCertificateCreateWithData(kCFAllocatorDefault, cert_bytes);
  63         if (!cert)  {
  64             *a_collect_certs_context->status = p12_decodeErr;
  65             return;
  66         }
  67         CFMutableArrayRef cert_array = a_collect_certs_context->certs;
  68         CFArrayAppendValue(cert_array, cert);
  69         CFRelease(cert);
  70     }
  71 }
  72
  73 typedef struct {
  74     CFMutableArrayRef identities;
  75     CFArrayRef certs;
  76     p12_error *status;
  77 } build_trust_chains_context;
  78
  79 static void build_trust_chains(const void *key, const void *value,
  80     void *context)
  81 {
  82     CFMutableDictionaryRef identity_dict = CFDictionaryCreateMutable(kCFAllocatorDefault,
  83         0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
  84     SecKeyRef private_key = NULL;
  85     SecCertificateRef cert = NULL;
  86     SecIdentityRef identity = NULL;
  87     SecPolicyRef policy = NULL;
  88     CFMutableArrayRef cert_chain = NULL, eval_chain = NULL;
  89     SecTrustRef trust = NULL;
  90     build_trust_chains_context * a_build_trust_chains_context = (build_trust_chains_context*)context;
  91
  92     CFDataRef key_bytes = CFDictionaryGetValue(value, CFSTR("key"));
  93     require(key_bytes, out);
  94     CFDataRef cert_bytes = CFDictionaryGetValue(value, CFSTR("cert"));
  95     require(cert_bytes, out);
  96     CFDataRef algoid_bytes = CFDictionaryGetValue(value, CFSTR("algid"));
  97
  98
  99     DERItem algorithm = { (DERByte *)CFDataGetBytePtr(algoid_bytes), CFDataGetLength(algoid_bytes) };
 100     if (DEROidCompare(&oidEcPubKey, &algorithm)) {
 101         require (private_key = SecKeyCreateECPrivateKey(kCFAllocatorDefault,
 102                                                          CFDataGetBytePtr(key_bytes), CFDataGetLength(key_bytes),
 103                                                          kSecKeyEncodingPkcs1), out);
 104     } else if (DEROidCompare(&oidRsa, &algorithm)) {
 105         require (private_key = SecKeyCreateRSAPrivateKey(kCFAllocatorDefault,
 106                                                          CFDataGetBytePtr(key_bytes), CFDataGetLength(key_bytes),
 107                                                          kSecKeyEncodingPkcs1), out);
 108     } else {
 109         *a_build_trust_chains_context->status = p12_decodeErr;
 110         goto out;
 111     }
 112
 113     require_action(cert = SecCertificateCreateWithData(kCFAllocatorDefault, cert_bytes), out,
 114                    *a_build_trust_chains_context->status = p12_decodeErr);
 115     require_action(identity = SecIdentityCreate(kCFAllocatorDefault, cert, private_key), out,
 116                    *a_build_trust_chains_context->status = p12_decodeErr);
 117     CFDictionarySetValue(identity_dict, kSecImportItemIdentity, identity);
 118
 119     eval_chain = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
 120     require(eval_chain, out);
 121     CFArrayAppendValue(eval_chain, cert);
 122     CFRange all_certs = { 0, CFArrayGetCount(a_build_trust_chains_context->certs) };
 123     CFArrayAppendArray(eval_chain, a_build_trust_chains_context->certs, all_certs);
 124     require(policy = SecPolicyCreateBasicX509(), out);
 125     SecTrustResultType result;
 126     SecTrustCreateWithCertificates(eval_chain, policy, &trust);
 127     require(trust, out);
 128     SecTrustEvaluate(trust, &result);
 129     CFDictionarySetValue(identity_dict, kSecImportItemTrust, trust);
 130
 131     require(cert_chain = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks), out);
 132     CFIndex cert_chain_length = SecTrustGetCertificateCount(trust);
 133     int i;
 134     for (i = 0; i < cert_chain_length; i++)
 135         CFArrayAppendValue(cert_chain, SecTrustGetCertificateAtIndex(trust, i));
 136     CFDictionarySetValue(identity_dict, kSecImportItemCertChain, cert_chain);
 137
 138     CFArrayAppendValue(a_build_trust_chains_context->identities, identity_dict);
 139 out:
 140     CFReleaseSafe(identity_dict);
 141     CFReleaseSafe(identity);
 142     CFReleaseSafe(private_key);
 143     CFReleaseSafe(cert);
 144     CFReleaseSafe(policy);
 145     CFReleaseSafe(cert_chain);
 146     CFReleaseSafe(eval_chain);
 147     CFReleaseSafe(trust);
 148 }
 149
 150 OSStatus SecPKCS12Import(CFDataRef pkcs12_data, CFDictionaryRef options, CFArrayRef *items)
 151 {
 152     pkcs12_context context = {};
 153     SecAsn1CoderCreate(&context.coder);
 154     if (options)
 155         context.passphrase = CFDictionaryGetValue(options, kSecImportExportPassphrase);
 156     context.items = CFDictionaryCreateMutable(kCFAllocatorDefault,
 157         0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
 158     p12_error status = p12decode(&context, pkcs12_data);
 159     if (!status) {
 160         CFMutableArrayRef certs = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
 161         collect_certs_context a_collect_certs_context = { certs, &status };
 162         CFDictionaryApplyFunction(context.items, collect_certs, &a_collect_certs_context);
 163
 164         if (!status) {
 165             CFMutableArrayRef identities = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
 166             build_trust_chains_context a_build_trust_chains_context = { identities, certs, &status };
 167             CFDictionaryApplyFunction(context.items, build_trust_chains, &a_build_trust_chains_context);
 168             CFReleaseSafe(certs);
 169
 170             /* ignoring certs that weren't picked up as part of the certchain for found keys */
 171             *items = identities;
 172         }
 173     }
 174
 175     CFReleaseSafe(context.items);
 176     SecAsn1CoderRelease(context.coder);
 177
 178     switch (status) {
 179     case p12_noErr: return errSecSuccess;
 180     case p12_passwordErr: return errSecAuthFailed;
 181     case p12_decodeErr: return errSecDecode;
 182     default: return errSecInternal;
 183     };
 184     return errSecSuccess;
 185 }
 186